from collections import OrderedDict

d = OrderedDict()
d['foo'] = 1
d['bar'] = 21
d['spam'] = 3
d['grok'] = 4
# Outputs "foo 1", "bar 2", "spam 3", "grok 4"
for key in d:
    print(key, d[key])


if __name__ == '__main__':
    import json
    json.dumps(d)
